{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2002:PTE2BSZ2DTVJY5B4NQRIV5L7I5","short_pith_number":"pith:PTE2BSZ2","canonical_record":{"source":{"id":"astro-ph/0202173","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-02-08T09:48:47Z","cross_cats_sorted":[],"title_canon_sha256":"1c4ad8afdd7a1ef02c733f5fdfe5e609fbd0431a7ccb5121b1887e68911df6e2","abstract_canon_sha256":"958b5bcd844b7a328a0a55dd44c3c6ad44045d425409ecc3377f7931dd762946"},"schema_version":"1.0"},"canonical_sha256":"7cc9a0cb3a1cea9c743c6c228af57f47537e10f1ca3ce15d64336799cb36d0a1","source":{"kind":"arxiv","id":"astro-ph/0202173","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0202173","created_at":"2026-07-04T17:25:11Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0202173v1","created_at":"2026-07-04T17:25:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0202173","created_at":"2026-07-04T17:25:11Z"},{"alias_kind":"pith_short_12","alias_value":"PTE2BSZ2DTVJ","created_at":"2026-07-04T17:25:11Z"},{"alias_kind":"pith_short_16","alias_value":"PTE2BSZ2DTVJY5B4","created_at":"2026-07-04T17:25:11Z"},{"alias_kind":"pith_short_8","alias_value":"PTE2BSZ2","created_at":"2026-07-04T17:25:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2002:PTE2BSZ2DTVJY5B4NQRIV5L7I5","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0202173","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2002-02-08T09:48:47Z","cross_cats_sorted":[],"title_canon_sha256":"1c4ad8afdd7a1ef02c733f5fdfe5e609fbd0431a7ccb5121b1887e68911df6e2","abstract_canon_sha256":"958b5bcd844b7a328a0a55dd44c3c6ad44045d425409ecc3377f7931dd762946"},"schema_version":"1.0"},"canonical_sha256":"7cc9a0cb3a1cea9c743c6c228af57f47537e10f1ca3ce15d64336799cb36d0a1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:25:11.607542Z","signature_b64":"gIjMsV/auVcyHFwgb5sTxL5Wz82KRUzHavqd2zZZYBn5y5DGo2DS9RpJ8MPEiotL2+WkvobHvdxkjVxgtoERCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7cc9a0cb3a1cea9c743c6c228af57f47537e10f1ca3ce15d64336799cb36d0a1","last_reissued_at":"2026-07-04T17:25:11.606827Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:25:11.606827Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0202173","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T17:25:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/vWvzYuuty3ih+n3iVHpzgTwwL9isb2UaIBOo3NLp5NiC5YwI2h0XqEp2TxPXm/ty1AXwDOT7fAXhQv96GjhAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T06:30:45.220160Z"},"content_sha256":"61f70ca4006bfba34a3a57120c739f463e23b6e5878faa71cf50f04c8f2d0e41","schema_version":"1.0","event_id":"sha256:61f70ca4006bfba34a3a57120c739f463e23b6e5878faa71cf50f04c8f2d0e41"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2002:PTE2BSZ2DTVJY5B4NQRIV5L7I5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dense Cores in Dark Clouds. XIV. N2H+(1-0) maps of dense cloud cores","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Mario Tafalla, Paola Caselli, Philip C. Myers, Priscilla J. Benson","submitted_at":"2002-02-08T09:48:47Z","abstract_excerpt":"We present results of an extensive mapping survey of N2H+(1-0) in about 60 low mass cloud cores already mapped in the NH3(1,1) inversion transition line. The survey has been carried out at the FCRAO antenna with an angular resolution about 1.5 times finer than the previous ammonia observations. Cores with stars typically have map sizes about a factor of two smaller for N2H+ than for NH3, indicating the presence of denser and more centrally concentrated gas compared to starless cores. Significant correlations are found between NH3 and N2H+ column densities and excitation temperatures in starles"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0202173","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0202173/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T17:25:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"39ryDOtMO0jR9tKpgCAGwISlQfO1KnAjwXPXzAAX/qi9CBq3pZA9VyNgVXHM2L5RuztEWKhjPfJ0cDc6/3w7AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T06:30:45.220662Z"},"content_sha256":"afbd312d3bc9428cc421f04d93db1ac8f5cb71bfdb781e44a69bce52446f4942","schema_version":"1.0","event_id":"sha256:afbd312d3bc9428cc421f04d93db1ac8f5cb71bfdb781e44a69bce52446f4942"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PTE2BSZ2DTVJY5B4NQRIV5L7I5/bundle.json","state_url":"https://pith.science/pith/PTE2BSZ2DTVJY5B4NQRIV5L7I5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PTE2BSZ2DTVJY5B4NQRIV5L7I5/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-06T06:30:45Z","links":{"resolver":"https://pith.science/pith/PTE2BSZ2DTVJY5B4NQRIV5L7I5","bundle":"https://pith.science/pith/PTE2BSZ2DTVJY5B4NQRIV5L7I5/bundle.json","state":"https://pith.science/pith/PTE2BSZ2DTVJY5B4NQRIV5L7I5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PTE2BSZ2DTVJY5B4NQRIV5L7I5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:PTE2BSZ2DTVJY5B4NQRIV5L7I5","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"958b5bcd844b7a328a0a55dd44c3c6ad44045d425409ecc3377f7931dd762946","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-02-08T09:48:47Z","title_canon_sha256":"1c4ad8afdd7a1ef02c733f5fdfe5e609fbd0431a7ccb5121b1887e68911df6e2"},"schema_version":"1.0","source":{"id":"astro-ph/0202173","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0202173","created_at":"2026-07-04T17:25:11Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0202173v1","created_at":"2026-07-04T17:25:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0202173","created_at":"2026-07-04T17:25:11Z"},{"alias_kind":"pith_short_12","alias_value":"PTE2BSZ2DTVJ","created_at":"2026-07-04T17:25:11Z"},{"alias_kind":"pith_short_16","alias_value":"PTE2BSZ2DTVJY5B4","created_at":"2026-07-04T17:25:11Z"},{"alias_kind":"pith_short_8","alias_value":"PTE2BSZ2","created_at":"2026-07-04T17:25:11Z"}],"graph_snapshots":[{"event_id":"sha256:afbd312d3bc9428cc421f04d93db1ac8f5cb71bfdb781e44a69bce52446f4942","target":"graph","created_at":"2026-07-04T17:25:11Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/0202173/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present results of an extensive mapping survey of N2H+(1-0) in about 60 low mass cloud cores already mapped in the NH3(1,1) inversion transition line. The survey has been carried out at the FCRAO antenna with an angular resolution about 1.5 times finer than the previous ammonia observations. Cores with stars typically have map sizes about a factor of two smaller for N2H+ than for NH3, indicating the presence of denser and more centrally concentrated gas compared to starless cores. Significant correlations are found between NH3 and N2H+ column densities and excitation temperatures in starles","authors_text":"Mario Tafalla, Paola Caselli, Philip C. Myers, Priscilla J. Benson","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2002-02-08T09:48:47Z","title":"Dense Cores in Dark Clouds. XIV. N2H+(1-0) maps of dense cloud cores"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0202173","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:61f70ca4006bfba34a3a57120c739f463e23b6e5878faa71cf50f04c8f2d0e41","target":"record","created_at":"2026-07-04T17:25:11Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"958b5bcd844b7a328a0a55dd44c3c6ad44045d425409ecc3377f7931dd762946","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-02-08T09:48:47Z","title_canon_sha256":"1c4ad8afdd7a1ef02c733f5fdfe5e609fbd0431a7ccb5121b1887e68911df6e2"},"schema_version":"1.0","source":{"id":"astro-ph/0202173","kind":"arxiv","version":1}},"canonical_sha256":"7cc9a0cb3a1cea9c743c6c228af57f47537e10f1ca3ce15d64336799cb36d0a1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7cc9a0cb3a1cea9c743c6c228af57f47537e10f1ca3ce15d64336799cb36d0a1","first_computed_at":"2026-07-04T17:25:11.606827Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:25:11.606827Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gIjMsV/auVcyHFwgb5sTxL5Wz82KRUzHavqd2zZZYBn5y5DGo2DS9RpJ8MPEiotL2+WkvobHvdxkjVxgtoERCQ==","signature_status":"signed_v1","signed_at":"2026-07-04T17:25:11.607542Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0202173","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:61f70ca4006bfba34a3a57120c739f463e23b6e5878faa71cf50f04c8f2d0e41","sha256:afbd312d3bc9428cc421f04d93db1ac8f5cb71bfdb781e44a69bce52446f4942"],"state_sha256":"4bc3e77f22f97f6449cd5287e39c9d0999bd27a23f8cf73e2c7eb31fc853183c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BMogRjUMA0c0EzQB/h5xyCYJ5iv2nwjm+797D41GeRirfyxKfI/ZuIrzpsVXkqC9PaCLyjCN2PMqpxmkb5xbDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T06:30:45.224583Z","bundle_sha256":"7d2fed19e4680c724fa92db512c8b55dce13c0306886df1bcf89489f87857988"}}